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Annular valve plate type downhole safety device

A safety device and annular valve technology, which is used in wellbore/well valve devices, drilling equipment, wellbore/well components, etc. The effect of returning

Active Publication Date: 2018-03-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these oil production technologies usually place sucker rods or small oil pipes in the oil pipes, which will directly cause the downhole safety valve in the prior art to fail to work because the valve plate is blocked by the sucker rods or small oil pipes, and cannot be opened normally. and off

Method used

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  • Annular valve plate type downhole safety device
  • Annular valve plate type downhole safety device
  • Annular valve plate type downhole safety device

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Embodiment 1

[0048] Such as figure 2 As shown, Embodiment 1 of the present invention provides an annular valve plate type downhole safety device, which includes a main body 3 , an upper cover 8 located above the main body 3 and a lower cover 1 located below the main body 3 .

[0049] The main body 3 is provided with a hollow channel and an inner sealing cannula 6 that runs through the hollow channel. The top end of the inner sealing cannula 6 is used to communicate with the oil extraction pipe 14, and the bottom end of the inner sealing cannula 6 is used to communicate with the pump barrel 27 at the bottom end of the tubing string. ; The inner hole 100 set in the inner sealing insert 6 can provide an independent transmission channel between the pump cylinder 27 and the oil extraction pipe 14 to ensure the normal operation of the oil extraction pipe 14 .

[0050]The bottom end of the upper cover 8 can be sleeved on the outer edge of the top of the main body 3, the top of the upper cover 8 ...

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Abstract

The invention discloses an annular valve plate type downhole safety device. The device comprises a main body, an upper cover located at the upper portion of the main body and a lower cover located atthe lower portion of the main body; the main body is provided with a hollow channel and an inner sealing insertion pipe penetrating through the hollow channel, the top of the inner sealing insertion pipe is used for being communicated with an oil pumping pipe, and the bottom of the inner sealing insertion pipe is used for being communicated with a pump cylinder at the bottom of a pipe column of anoil pipe; an inner hole formed in the inner sealing insertion pipe forms an independent conveying channel between the pump cylinder and the oil pumping pipe. The device relates to but is not limitedto offshore oil extraction technologies; by means of the device, the defects existing in the prior art can be effectively overcome, and downhole fluid can still be controlled to return when an oil pumping rod or a small oil pipe is placed in the oil pipe.

Description

technical field [0001] The present application relates to but not limited to offshore oil exploitation technology, especially an annular valve plate type downhole safety device. Background technique [0002] According to the national offshore oil safety production regulations, downhole packers should be installed in offshore gas wells, self-flowing wells, and self-overflow wells; downhole safety valves should be installed below 30 meters of the seabed to prevent downhole fluids from accidentally returning to offshore platforms and Hazard to the marine environment. [0003] At present, some large cement-legged platforms are put into use. Due to the larger platform space, many rod pumps, such as belt pumping units or chain pumping units, are successively applied to offshore platforms; in addition, some pipe strings are relatively large. Complex oil extraction technology, such as concentric tube jet pump oil recovery technology will also be applied to offshore platforms. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B33/12E21B34/06E21B17/042
CPCE21B17/042E21B33/12E21B34/06E21B43/12
Inventor 王通孙永涛马增华白健华顾启林蒋召平胡厚猛林珊珊李海涛
Owner CHINA NAT OFFSHORE OIL CORP
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